{

core::String lowered;

lowered.reserve(value.size());

for (const unsigned char character : value)

{

lowered += static_cast<char>(std::tolower(character));

}

return lowered;

{

const core::String lowered = command_guards_to_lower_ascii(command_or_args);

static const char* const kDestructivePatterns[] = {

// Recursive/forced delete (Windows and POSIX shapes).

"rm -rf", "rm -fr", "rm -r -f", "rm -f -r", "rd /s", "rmdir /s",

"del /f /s", "del /s /f", "remove-item -recurse -force",

// Disk/partition-level operations - irreversible by nature.

"format ", "diskpart", "mkfs", "dd if=", "fdisk",

// Broad forced process/service termination (not a single named

// target - "taskkill /f /im *" or a bare "/f" with no /im at all

// reads as "kill something forcibly, unclear what").

"taskkill /f /im *", "shutdown /r", "shutdown /s", "shutdown -r", "shutdown -h",

// A classic fork bomb.

":(){ :|:& };:", ":(){:|:&};:",

};

for (const char* pattern : kDestructivePatterns)

{

if (lowered.find(pattern) != core::String::npos)

{

return true;

}

}

return false;